庞大
pángdà · HSK 7
huge
🐘 庞 (huge) + 大 (big) = two big-words stacked, so it means huge times two
庞大 doubles up: 庞 already means enormous and 大 means big, so the compound stresses sheer scale. Sound hook: pángdà rhymes with pong-DAH, the second syllable landing hard like something massive.
大 — pictograph of a person with arms outstretched
大 is a pictograph showing a person standing with arms and legs spread wide. The outstretched arms suggest 'big' or 'great', extending from the literal image of a large stance to abstract meanings like important or grand. It is one of the oldest characters, found on oracle bones.